Andrew l



(No Model.)

A. L. BIKER. DYNAMO ELECTRIC MACHINE 0R MOTOR. N0.,416,013. PatentedNov. 26, 1889.

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UNITED STATES PATENT OFFICE.

ANDREW Ii. BIKER, OF NEIV YORK, N. Y.

DYNAMO-ELECTRIC MACHINE OR MOTOR.

SPECIFICATION forming part of Letters Patent No. 416,013, dated November 26, 1889.

Application filed July 8, 1889. $erial No. 316,838. (No model.)

To all whom it may concern.-

Be it known that 1, ANDREW L. BIKER, of New York city, in the county and State of New York, have invented a new and useful Improvement in Dynamo-Electric Machines or Motors, which improvement is fully set forth in the following specification.

This invention has reference to the construction of dynamo-electric machines or motors; and its general object is to secure simplicit-y, strength, compactness and economy in construction and efficiency in operation. These objects are secured in the machine hereinafter described, in which the bed plate or base is in two parts, and each part has cast in one piece with it an uprightpole-piece, the pole-pieces being of smaller sectional area at the top than at the bottom, and being inclined toward each other, so that they are closer together at the top than at the bottom. When the machine is put together, the two parts of the bed do not touch each other, but are separated a sufficient distance to prevent short-circuiting of the poles. The cores of the field-m agnets are of wrough t-iron, and are placed between the two poles and secured thereto by bolts. The core of the upper magnet is shorter than that of the lower. Standards of brass or other non-magnetic metal are bolted to the bed-plate, bridging the space between the two parts thereof, and in these standards are the bearings of the armatureshaft. These parts, constructed and combined as more fully explained hereinafter, constitute a compact and strong structure in which the center of gravity is low, owing to the shape of the pole-pieces and their inclination toward each other, the parts few and easily made, and the magnetic circuit as short as can practically be obtained.

The invention includes many novel features of construction, which will be hereinafter fully described, and distinctly pointed out in the claims at the end of this specification.

In order that the invention may be fully understood, and that the advantages thereof may more clearly appear, I will now describe What is considered the best embodiment .of the principle of my invention, reference being had to the accompanying drawings, in which- Figure I is an end elevation, Fig. II a side elevation, and I ig. III a top view, of a dynamo-electric machine constructed in accordance with the invention.

The armature and commutator are not shown in Fig. III.

The two parts D D of the bed extend longi- I top, and the center of gravity is considerably below the center line. This construction contributes greatly to the stability of the machine. By the expression diminishing in cross-section it is not meant that the polepieces are necessarily tapering in form, but that the parts thereof above the armatureshaft are smaller in section than the corresponding parts below the same. Thus the section of the pole-pieces B at the upper polar extensions m is smaller than at the lower extensions n.

The core A of the upper field-magnet is of wrought-iron. It is inserted between the two pole-pieces, forming a butt-joint therewith and firmly secured thereto by the bolts 0. The lower core A, also of wrought-iron, is similarly secured to the pole-pieces, and these parts complete the magnetic circuit. It will be observed that the two parts D of the bed do not touch each other at any point. The upper core A and coil F are shorter than the lower core A and coil F, giving the greater weight of metal to the lower part of the machine.

The pole-pieces B have cast thereon above and below the bosses H, which are of about the same diameter as the coils, and serve to inclose and protect the ends thereof. The bosses H for the lower magnet merge into the surface of the bed or base D. A recess is formed in the bed D D and in the lower part of each pole-piece B, and in this space the core A and coil F of the lower magnet are inclosed, and are thus protected in great measure from damage and injury.

The standards E are of brass or other nonmagnetic metal and carry the tubular bearings e of the armature-shaft I. The bases of standards E bridge the space between the two parts D D of the bed and are firmly bolted thereto, thus increasing the strength of the supporting-frame.

The armature K, commutator L, and commutator-brushes Z may be of any ordinary or suitable construction.

It will be observed that the stationary portion of the machine is made up of only six partsnamely, two bed and pole pieces east together, two wrought-iron cores, and two standards or supportsand that these parts are easily made and united, and when put together constitute a structure of great strength and stability.

Having now fully described my said invention, What I claim is 1. In a dynamo or motor, the combination, with upright cast-iron pole-pieces diminishing in section from the bottom to the top, of wrought-iron cores connecting the poles at their ends, substantially as described.

2. In a dynamo, the combination of the base in two parts, the upright pole-pieces, each cast integral with one of said parts, and the cores, one above and the other beneath the armature and bolted between the ends of said pole-pieces, substantially as described.

3. In a dynamo or motor, the combination, with the base, of the poles diminishing in section toward the top and also converging toward each other, and the cores connecting said poles, substantially as described.

4. In a dynamo or motor, the combination, with the upright poles, of the cores connecting the poles at top and bottom, the upper core being shorter than the lower, substantially as described.

5. The combination, with the armature, of the upright pole-pieces having polar extensions below the armature and similar extensions above the same of smaller sectional area than the lower extensions, substantially as described.

6. In a dynamo or motor, the combination of the base in two parts, the converging polepieces, each cast integral with one part of said base, and the cores connecting the poles at the ends, one of said cores being longer than the other, substantially as described.

7. In a dynamo or motor, the combination, with the base in two parts separated by an air-space and the upright poles springing therefrom, of the standards of non-magnetic material bridging the space between said parts, said standards carrying the bearings of the armature-shaft, and the horizontal cores, one above and the other beneath the armature, bolted between the ends of said pole-pieces, substantially as described.

8. In a dynamo or motor, the combination. of the base in two parts, the pole-pieces each integral with one of said parts, said base and pole-pieces being recessed, as indicated, and a core and coil inclosed in said recess, substantially as described.

9. In a dynamo or motor, the combination of the following elements: the base or bed in two parts separated longitudinallyby an airspace, the pole-pieces each cast in one piece with one part of the bed or base, said polepieces inclining toward each other and dim-inishing in sectional area from the bottom upward, the wrought-iron cores bolted between said pole-pieces on opposite sides of the armature, and the non-magnetic standards carrying the bearings for the armatureshaft, said standards being bolted to the two parts of the bed and crossing the space between them, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ANDRE L. III ER.

\Vitnesses:

PERRY .I. FULLER, E. Rrrznnn DE GROVE. 

